2017ApJ...837..130V


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.17CEST01:33:16

2017ApJ...837..130V - Astrophys. J., 837, 130-130 (2017/March-2)

A Chandra X-Ray census of the interacting binaries in old open clusters - Collinder 261.

VATS S. and VAN DEN BERG M.

Abstract (from CDS):

We present the first X-ray study of Collinder 261 (Cr 261), which at an age of 7 Gyr is one of the oldest open clusters known in the Galaxy. Our observation with the Chandra X-Ray Observatory is aimed at uncovering the close interacting binaries in Cr 261, and reaches a limiting X-ray luminosity of LX~4×1029 erg s–1 (0.3-7 keV) for stars in the cluster. We detect 107 sources within the cluster half-mass radius rh, and we estimate that among the sources with LX 1030 erg s–1, ∼26 are associated with the cluster. We identify a mix of active binaries and candidate active binaries, candidate cataclysmic variables, and stars that have "straggled" from the main locus of Cr 261 in the color-magnitude diagram. Based on a deep optical source catalog of the field, we estimate that Cr 261 has an approximate mass of 6500 M, roughly the same as the old open cluster NGC 6791. The X-ray emissivity of Cr 261 is similar to that of other old open clusters, supporting the trend that they are more luminous in X-rays per unit mass than old populations of higher (globular clusters) and lower (the local neighborhood) stellar density. This implies that the dynamical destruction of binaries in the densest environments is not solely responsible for the observed differences in X-ray emissivity.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: close - novae, cataclysmic variables - open clusters and associations: individual: Collinder 261 - stars: activity - X-rays: binaries - X-rays: binaries

VizieR on-line data: <Available at CDS (J/ApJ/837/130): table1.dat table2.dat>

Nomenclature: Table 1: [VV2017] NNN (Nos 1-151).

Simbad objects: 161

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Number of rows : 161

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11343 1
2 NGC 188 OpC 00 48 26 +85 15.3           ~ 835 0
3 Cl Berkeley 17 OpC 05 20 37 +30 35.4           ~ 141 0
4 NGC 2682 81 BS* 08 51 11.7795102754 +11 45 22.122658355   9.96 10.024     B8V 91 0
5 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2105 0
6 Cl* NGC 2682 SAND 1082 EB* 08 51 20.7915 +11 53 26.168   11.66 11.150 11.09 10.722 F5IV 116 0
7 [VV2017] 92 X 12 36 30.770 -68 22 49.29           ~ 1 0
8 [VV2017] 44 CV? 12 36 40.644 -68 21 22.09   22.95 21.67     ~ 1 0
9 [VV2017] 52 X 12 36 44.988 -68 19 26.41           ~ 1 0
10 [VV2017] 131 X 12 36 46.273 -68 25 28.43           ~ 1 0
11 [VV2017] 36 X 12 36 56.322 -68 22 04.56     22.1     ~ 1 0
12 [VV2017] 60 * 12 36 56.6257534883 -68 24 49.197383124           ~ 3 0
13 [VV2017] 23 X 12 37 04.714 -68 23 32.00           ~ 1 0
14 [VV2017] 26 X 12 37 07.433 -68 23 34.55           ~ 1 0
15 [VV2017] 41 XB? 12 37 07.462 -68 24 43.99   21.49 20.15     ~ 1 0
16 [VV2017] 64 X 12 37 08.808 -68 23 21.16           ~ 1 0
17 [VV2017] 43 X 12 37 09.389 -68 27 08.13           ~ 1 0
18 [VV2017] 45 X 12 37 11.600 -68 20 36.59           ~ 1 0
19 [VV2017] 119 X 12 37 14.879 -68 20 18.61     21.50     ~ 1 0
20 [VV2017] 40 X 12 37 15.672 -68 27 28.61   14.05 13.52     ~ 1 0
21 [VV2017] 32 X 12 37 16.285 -68 20 36.14           ~ 1 0
22 [VV2017] 28 XB* 12 37 16.330 -68 25 18.75   17.432 16.164     ~ 1 0
23 [VV2017] 117 X 12 37 18.303 -68 18 22.98           ~ 1 0
24 [VV2017] 80 XB? 12 37 23.355 -68 27 45.23   20.53 19.35     ~ 1 0
25 [VV2017] 66 X 12 37 24.411 -68 28 54.15           ~ 1 0
26 [VV2017] 49 XB* 12 37 25.408 -68 24 43.91   16.913 15.899     ~ 1 0
27 [VV2017] 128 XB* 12 37 27.228 -68 23 16.02   21.68 20.26     ~ 1 0
28 [VV2017] 48 X 12 37 29.197 -68 17 06.75           ~ 1 0
29 [VV2017] 135 X 12 37 31.023 -68 18 41.99           ~ 1 0
30 V* GZ Mus XB* 12 37 31.1663242514 -68 21 28.065644541   18.193 17.078     ~ 8 0
31 [VV2017] 35 X 12 37 32.870 -68 26 48.22           ~ 1 0
32 V* HH Mus EB* 12 37 32.901 -68 22 54.92   22.15 20.27     ~ 5 0
33 [VV2017] 11 X 12 37 34.741 -68 14 18.63           ~ 1 0
34 [VV2017] 141 X 12 37 35.415 -68 20 40.29           ~ 1 0
35 [VV2017] 38 CV? 12 37 35.863 -68 14 30.79           ~ 1 0
36 [VV2017] 111 X 12 37 38.931 -68 21 18.84           ~ 1 0
37 [VV2017] 2 X 12 37 40.935 -68 27 30.84           ~ 1 0
38 [VV2017] 56 X 12 37 41.300 -68 21 30.00           ~ 1 0
39 [VV2017] 129 X 12 37 43.728 -68 25 18.98   13.79 13.07     ~ 1 0
40 [VV2017] 74 BS* 12 37 44.188 -68 28 28.64   15.482 14.606     ~ 1 0
41 V* HK Mus XB* 12 37 44.646 -68 25 43.35           ~ 6 0
42 [VV2017] 10 X 12 37 44.938 -68 20 32.39   22.28 20.40     ~ 1 0
43 [VV2017] 113 X 12 37 45.921 -68 21 09.49           ~ 1 0
44 [VV2017] 6 X 12 37 50.568 -68 28 07.71           ~ 1 0
45 [VV2017] 47 XB* 12 37 51.129 -68 26 20.28   21.26 19.83     ~ 1 0
46 [VV2017] 12 * 12 37 51.334 -68 25 35.49   18.121 16.739     ~ 1 0
47 V* HN Mus EB* 12 37 51.3854213155 -68 22 34.371646747   16.795 15.803     ~ 8 0
48 [VV2017] 59 X 12 37 52.791 -68 25 59.04     13.75     ~ 1 0
49 [VV2017] 29 X 12 37 53.468 -68 20 00.06     22.5     ~ 1 0
50 [VV2017] 83 X 12 37 55.034 -68 15 42.90           ~ 1 0
51 [VV2017] 79 X 12 37 55.187 -68 25 14.18           ~ 1 0
52 [VV2017] 99 X 12 37 55.683 -68 26 07.58           ~ 1 0
53 V* HT Mus EB* 12 37 57.275 -68 25 02.15   20.08 12.90     ~ 6 0
54 [VV2017] 13 XB* 12 37 57.7237403529 -68 24 21.846597262   16.946 16.042     ~ 3 0
55 [VV2017] 70 CV? 12 37 58.441 -68 23 01.55   23.2 22.3     ~ 1 0
56 [VV2017] 21 X 12 37 58.732 -68 30 58.09           ~ 1 0
57 [VV2017] 137 X 12 37 58.881 -68 24 07.59   23.75 21.65     ~ 1 0
58 [VV2017] 51 XB* 12 37 59.0611844404 -68 25 10.170404786   18.674 17.558     ~ 3 0
59 [VV2017] 9 * 12 37 59.125 -68 16 09.34   16.608 15.458     ~ 1 0
60 Cl* Collinder 261 SBR 11 * 12 37 59.7124447324 -68 23 49.781954740   15.438 14.145   12.654 ~ 8 0
61 [VV2017] 78 XB* 12 37 59.7566094652 -68 23 03.247501546   18.238 17.134     ~ 3 0
62 V* HW Mus EB* 12 38 00.0112147845 -68 22 34.656279605   18.96 17.810     ~ 5 0
63 [VV2017] 112 XB* 12 38 00.215 -68 25 11.28   21.07 19.55     ~ 1 0
64 [VV2017] 61 XB* 12 38 00.537 -68 27 10.22   19.67 18.38     ~ 1 0
65 [VV2017] 94 XB* 12 38 00.6466410934 -68 21 59.635263979   17.547 16.440     ~ 3 0
66 [VV2017] 148 XB* 12 38 00.872 -68 22 26.12   21.4 19.81     ~ 1 0
67 [VV2017] 65 X 12 38 02.684 -68 30 00.59   22.8       ~ 1 0
68 [VV2017] 33 X 12 38 04.730 -68 23 34.13           ~ 1 0
69 [VV2017] 142 XB* 12 38 05.161 -68 25 31.74   18.952 17.842     ~ 1 0
70 [VV2017] 139 XB* 12 38 05.546 -68 21 00.65   20.18 19.04     ~ 1 0
71 [VV2017] 39 X 12 38 05.594 -68 26 23.45           ~ 1 0
72 [VV2017] 124 XB* 12 38 05.944 -68 22 55.78   20.26 19.06     ~ 1 0
73 [VV2017] 108 X 12 38 06.597 -68 26 16.79           ~ 1 0
74 [VV2017] 143 XB* 12 38 06.761 -68 19 14.05   22.48 20.96     ~ 1 0
75 [VV2017] 125 XB? 12 38 08.4612580600 -68 19 37.265205529   18.376 17.286     ~ 2 0
76 [VV2017] 50 X 12 38 08.909 -68 16 13.66           ~ 1 0
77 [VV2017] 121 X 12 38 09.295 -68 14 38.43           ~ 1 0
78 [VV2017] 81 XB* 12 38 09.876 -68 20 32.92           ~ 1 0
79 [VV2017] 102 * 12 38 10.5207676634 -68 21 05.356061595           ~ 3 0
80 [VV2017] 54 CV? 12 38 10.720 -68 27 50.82   22.6 21.20     ~ 1 0
81 [VV2017] 109 X 12 38 11.408 -68 13 08.89           ~ 1 0
82 Cl Collinder 261 OpC 12 38 11.5 -68 22 01     10.7     ~ 163 0
83 V* IK Mus XB* 12 38 11.6153799527 -68 24 10.286441883   18.472 17.331     ~ 8 0
84 [VV2017] 82 XB* 12 38 11.653 -68 25 22.98   20.45 19.19     ~ 1 0
85 V* IL Mus XB* 12 38 11.9158559937 -68 19 33.864502920   19.682 18.962     ~ 6 0
86 V* IM Mus EB* 12 38 12.1294292439 -68 17 12.252779227   19.386 18.221     ~ 6 0
87 [VV2017] 140 X 12 38 12.387 -68 24 41.26           ~ 1 0
88 [VV2017] 118 * 12 38 12.5718140355 -68 23 03.263307881           ~ 3 0
89 V* IO Mus EB* 12 38 13.5149018301 -68 22 14.239809898           ~ 8 0
90 [VV2017] 84 X 12 38 13.635 -68 26 37.85           ~ 1 0
91 [VV2017] 150 X 12 38 13.749 -68 26 08.30   17.819 16.712     ~ 1 0
92 [VV2017] 130 BS* 12 38 14.289 -68 20 02.68   16.22 15.303     ~ 1 0
93 [VV2017] 151 CV? 12 38 15.318 -68 19 41.75   20.23 19.16     ~ 1 0
94 [VV2017] 85 XB* 12 38 15.413 -68 24 27.36   20.06 18.83     ~ 1 0
95 [VV2017] 110 X 12 38 15.900 -68 21 34.79           ~ 1 0
96 [VV2017] 147 XB* 12 38 16.3624526822 -68 22 13.202949435   17.436 16.454     ~ 3 0
97 V* IP Mus EB* 12 38 16.5590039678 -68 25 18.945387149   15.187 14.361     ~ 8 0
98 V* IQ Mus EB* 12 38 16.7177268158 -68 24 36.079865216   16.605 15.781     ~ 10 0
99 [VV2017] 19 X 12 38 17.199 -68 20 39.94           ~ 1 0
100 [VV2017] 90 X 12 38 17.989 -68 24 17.86           ~ 1 0
101 [VV2017] 146 X 12 38 19.503 -68 18 30.07           ~ 1 0
102 [VV2017] 71 X 12 38 19.901 -68 19 08.44           ~ 1 0
103 [VV2017] 20 CV? 12 38 21.337 -68 13 12.29   22.39 21.79     ~ 1 0
104 [VV2017] 17 X 12 38 21.727 -68 28 20.73   22.9 22.4     ~ 1 0
105 [VV2017] 134 XB* 12 38 22.154 -68 25 57.87   22.15 20.54     ~ 1 0
106 [VV2017] 1 X 12 38 23.352 -68 22 06.93           ~ 1 0
107 [VV2017] 88 XB* 12 38 23.432 -68 17 07.00   21.39 19.90     ~ 1 0
108 [VV2017] 31 * 12 38 23.4497307068 -68 28 20.954896884   18.431 17.107     ~ 3 0
109 [VV2017] 103 XB* 12 38 23.821 -68 23 30.98   19.834 18.714     ~ 1 0
110 [VV2017] 115 XB? 12 38 26.0183731680 -68 25 34.031393403   20.96 19.70     ~ 2 0
111 [VV2017] 114 X 12 38 26.854 -68 18 59.15     21.50     ~ 1 0
112 [VV2017] 98 X 12 38 28.016 -68 24 42.73           ~ 1 0
113 [VV2017] 87 XB* 12 38 28.230 -68 21 16.55   20.98 19.50     ~ 1 0
114 [VV2017] 145 X 12 38 28.508 -68 26 24.46           ~ 1 0
115 V* IT Mus AB* 12 38 28.972 -68 19 20.39   19.91 18.92     ~ 6 0
116 TYC 9228-1801-1 * 12 38 32.4823311079 -68 29 49.371305504   12.23 11.09     ~ 1 0
117 [VV2017] 122 X 12 38 32.582 -68 23 24.78           ~ 1 0
118 [VV2017] 95 X 12 38 32.800 -68 22 02.19   14.464 13.744     ~ 1 0
119 [VV2017] 75 * 12 38 33.4750738782 -68 16 24.573533830           ~ 3 0
120 [VV2017] 104 X 12 38 33.695 -68 20 11.61           ~ 1 0
121 [VV2017] 46 XB* 12 38 35.221 -68 30 46.44           ~ 1 0
122 [VV2017] 53 X 12 38 35.406 -68 14 47.44   23.51 21.51     ~ 1 0
123 TYC 9228-355-1 * 12 38 35.541 -68 26 22.47   13.01 12.68     ~ 1 0
124 [VV2017] 106 X 12 38 36.834 -68 20 13.87           ~ 1 0
125 [VV2017] 30 X 12 38 36.929 -68 27 21.58   13.64 13.11     ~ 1 0
126 [VV2017] 107 X 12 38 39.256 -68 20 14.33           ~ 1 0
127 [VV2017] 76 X 12 38 39.395 -68 26 09.97           ~ 1 0
128 [VV2017] 8 CV? 12 38 39.745 -68 17 26.43   21.87 21.10     ~ 1 0
129 [VV2017] 101 X 12 38 39.946 -68 28 11.40           ~ 1 0
130 [VV2017] 116 X 12 38 41.324 -68 24 47.30           ~ 1 0
131 [VV2017] 105 X 12 38 41.717 -68 21 04.69           ~ 1 0
132 [VV2017] 22 CV? 12 38 42.061 -68 13 26.94   23.3       ~ 1 0
133 V* IW Mus XB* 12 38 42.37 -68 22 03.6   17.904 16.915     ~ 6 0
134 [VV2017] 91 X 12 38 44.754 -68 26 06.97   22.63 20.63     ~ 1 0
135 [VV2017] 132 BS* 12 38 45.287 -68 23 36.05   15.839 14.842     ~ 1 0
136 [VV2017] 42 X 12 38 46.806 -68 26 50.41           ~ 1 0
137 V* KK Mus EB* 12 38 50.3590638915 -68 16 40.192377580   17.495 16.452     ~ 5 0
138 [VV2017] 3 X 12 38 54.090 -68 15 56.57           ~ 1 0
139 [VV2017] 72 X 12 38 58.302 -68 27 03.40           ~ 1 0
140 [VV2017] 34 X 12 38 58.398 -68 17 43.76           ~ 1 0
141 [VV2017] 73 BS* 12 38 59.853 -68 23 07.41   14.921 14.028     ~ 1 0
142 [VV2017] 4 CV? 12 39 02.876 -68 22 28.51   22.92 21.65     ~ 1 0
143 [VV2017] 67 BS* 12 39 08.748 -68 24 05.49   17.312 16.520     ~ 1 0
144 [VV2017] 62 XB? 12 39 11.081 -68 17 05.55           ~ 1 0
145 [VV2017] 58 * 12 39 12.640 -68 27 37.39   19.166 17.744     ~ 1 0
146 [VV2017] 57 XB? 12 39 13.8181222250 -68 18 35.285839565   18.59 17.563     ~ 2 0
147 [VV2017] 37 X 12 39 14.577 -68 23 16.06           ~ 1 0
148 [VV2017] 25 XB? 12 39 18.650 -68 16 11.32   17.585 16.381     ~ 1 0
149 [VV2017] 96 X 12 39 18.887 -68 25 58.37           ~ 1 0
150 [VV2017] 127 X 12 39 19.128 -68 23 46.88           ~ 1 0
151 [VV2017] 77 X 12 39 20.285 -68 18 04.72   22.87 20.97     ~ 1 0
152 [VV2017] 16 X 12 39 23.522 -68 22 00.16           ~ 1 0
153 [VV2017] 63 X 12 39 26.757 -68 25 08.30     19.95     ~ 1 0
154 [VV2017] 55 * 12 39 28.6508898254 -68 24 53.091093546   18.423 17.623     ~ 3 0
155 [VV2017] 15 X 12 39 31.807 -68 17 30.79   20.52 18.903     ~ 1 0
156 [VV2017] 5 X 12 39 31.989 -68 25 59.37           ~ 1 0
157 [VV2017] 69 X 12 39 33.396 -68 17 58.97     22.7     ~ 1 0
158 [VV2017] 24 CV? 12 39 39.487 -68 18 58.42   21.4 20.37     ~ 1 0
159 [VV2017] 14 X 12 39 53.622 -68 20 51.97           ~ 1 0
160 NGC 6791 OpC 19 20 53 +37 46.3   10.52 9.5     ~ 909 0
161 NGC 6819 OpC 19 41 18 +40 11.2   8.21 7.3     ~ 499 0

    Equat.    Gal    SGal    Ecl

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2021.06.17-01:33:17

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